141results about How to "Easy to increase or decrease" patented technology

The invention discloses an on-line actual error compensation system of a sine and cosine encoder, which compensates for an error in the subdivision process of improving the resolution ratio of a sine and cosine output encoder on the basis of the subdivision technology of the sine and cosine output encoder so as to improve the accuracy of a feedback value of the encoder. The system has simple implementation, good using effect and excellent adaptability by combining an on-line actual error compensation method of the sine and cosine encoder with an accuracy compensation device of the sine and cosine encode, wherein the accuracy compensation device comprises a difference compensation period generation module, a sine and cosine data sampling and calculating module, an entire period calculating module, a table look-up module, an output mode selection module, a pulse mode output module, a modulus output module, an error table storage module and a summation module; and the system is suitable for the wide popularization in the fields of position measurement, angle measurement and motion control such as numerical control machine tools, high-accuracy measurement instruments and the like which are outputted by using a sine and cosine signal.

The invention discloses a video-loading balancing method used for a network monitoring system, which can effectively solve a problem in video recording servers in the system of over-loading. The method comprises the following steps: a unique URI identification is given for each terminal camera device and the video recording servers in the system, wherein a URI format is composed of two parts, namely a title and a domain name; each video recording server belongs to a certain domain, and a domain can have a plurality of the video recording servers; according to the URI identification of the terminal camera device, an application server analyzes out a second domain name part, and the name is the name of the domain of the terminal camera device; and then the application server can choose a video recording server from the domain to take charge of receiving and handling video requests from the application server.

The invention discloses an automatic express package sorting method based on district classification. The automatic express package sorting method comprises the following steps: S1, classifying areas covering express package destinations into a plurality of districts according to a dispatch range of dispatch points, and distributing a unique number X to each district; S2, dividing each district into a plurality of dispatch grids, and distributing a unique number Y to each dispatch grid in the same district; S3, acquiring address information of express package recipients; S4, positioning the districts and the grids to which express packages belong according to address information of the recipients, and acquiring values of the numbers X and Y; S5, printing labels including the values of X and Y, and sticking the labels to the express packages; S6, sorting the express packages with the same values of 'X and Y' to the same position. The invention further discloses an automatic express package sorting system based on district classification with the method. The method and the system can avoid repeated sorting in the dispatch process, so that the express packages can be stacked at a time; furthermore, different express companies can dispatch the express packages belonging to the same district, so that the sorting efficiency and the dispatch efficiency are greatly improved.

The invention discloses a precision compensation system of a sine-cosine output type encoder, which is characterized in that on the basis of the subdivision technology of the sine-cosine output type encoder, the error is compensated in the subdivision process of improving the resolution of the sine-cosine output type encoder, thereby improving the precision of the feedback value of the encoder. By combining a precision compensation method of the sine-cosine output type encoder with a precision compensator of the sine-cosine encoder, which comprises a compensation period generating module, a sine-cosine data sampling and computing module, a full period computing module, a look-up module, an output mode selecting module, a pulse mode output module, an absolute value output module, an error table storing module and a summing module, the system has simple implementation, good using effect and excellent adaptability and is suitable for being widely popularized in all fields of position measurement, angle measurement and motion control using sine-cosine signal output, such as numerical control machine tools, high-precision measuring instruments and the like.

The invention provides a personnel positioning system. The personnel positioning system comprises a personnel positioning communication base station (1), a personnel positioning portable terminal (2), positioning beacons (3) and a personnel positioning server (4), wherein the positioning beacons (3) are arranged at the fixed positions according to the needs, are provided with unique numbers related to installing position information and send number information periodically to the personnel positioning portable terminal in a wireless manner; the personnel positioning portable terminal (2) is carried by personnel, receives the number information sent by all the positioning beacons (3) in real time, obtains current position information by processing, displays the current position information to a carrier and sends the current position information to the personnel positioning server (4). The personnel positioning system provided by the invention has the advantages that the structure is simple, the number of types of equipment is small, and different positioning-accuracy requirements corresponding to different scenes can be met according to the needs.

The invention discloses a video monitoring system based on a computer network, which comprises a client, a terminal camera device, an event server, a video recording server, a network server, an application server, a database server, etc., wherein the application server is respectively connected with the event server, the video recording server, the network server and the database server through the computer network, and exchanges data with the servers. By using the application server to conduct the data relay among the servers, the entire video monitoring system becomes convenient, fast, safe and reliable.

The invention discloses an intelligent power module for LED (light-emitting diode) lamps, which is based on electric carrier waves with address control. The intelligent power module comprises single-phase electric lines, and is characterized in that a plurality of LED lamps are arranged on the single-phase electric lines in series, wherein an LED lamp control system is arranged among the single-phase electric lines and each LED lamp; the LED lamp control systems comprise control modules, power modules, electric carrier wave modulation and demodulation modules, LED driving modules and dial switch address modules; the control modules are connected with the electric carrier wave modulation and demodulation modules; and the dial switch address modules are arranged on the control modules. The intelligent power module has three working modes, namely a single receiving mode, a receiving and transmitting mode and a dormant mode, and the working modes can be switched over intelligently according to a received control command, so as to reduce power consumption. The intelligent power module improves the stability and the reliability of the systems, and takes three circuit protection measures, namely output short-circuit protection, temperature protection and overcurrent protection, thereby ensuring the safety and the reliably of circuits.

The invention provides a calculator system, comprising: a CPU, a north bridge chip, a BIOS, a plurality of hardware modules, a south bridge chip and a complex programmable logic device. The north bridge chip is coupled to the CPU, and the south bridge chip is electrically connected with the BIOS and the north bridge chip. The south bridge chip comprises a serial signal interface including four universal input/output ports as follows: a clock pulse signal port for providing pulse signals; a data input port for transmitting hardware module state information to the BIOS; a data output port for transmitting control instructions from the BIOS; and a data latching port for starting or closing the data input port and the data output port. The complex programmable logic device is electrically connected with the serial signal interface. With the calculator system, a control function of the south bridge chip for the hardware modules can be expanded by fewer universal input/output ports, and control circuits of the hardware modules can be conveniently increased or reduced and modified through the complex programmable logic device.

The invention relates to an industrial control safety audit system based on protocol deep analysis and an application thereof. The system comprises an on-site monitoring layer, a control layer, a physical layer, an industrial control safety audit module and a safety protection management platform, the industrial Ethernet and an on-site bus are located between the field monitoring layer and the physical layer, the on-site monitoring layer performs data transmission and behavior control on the control layer through the industrial Ethernet, the physical layer is connected with the on-site bus through a sensor, an actuator and the like, and the on-site monitoring layer is mainly used for abnormality detection of an industrial network; according to the invention, targeted detection of abnormalbehaviors can be carried out, the accuracy is high, a physical layer realizes effective physical blocking of malicious behaviors such as network attacks and illegal access in operation of industrial control system equipment by controlling an interface of an external control line, and loss is stopped in time; the industrial control system equipment terminal security protection method is good in compatibility, better in applicability, convenient in equipment increase and decrease, and capable of flexibly updating the alarm rule base and improving the protection capability.

The invention discloses a high speed sine and cosine subdividing device. Multiple interpolation subdivision is performed to a sine and cosine signal via a sine and cosine data sampling and calculating module, a whole period calculating module, a table look-up module, a summation module, an output mode selecting module, a pulse mode output module and an absolute value, in order to precisely output a low-precision sine and cosine via a coder. The device has high subdividing precision, can respond rapidly via a single chip system and can reach to a responding speed of foreign products having a same precision. Besides, due to simple structure, convenient manufacturing and low cost, the invention can be applied widely in all fields of position measuring, angle measuring and movement control by outputting with a sine and cosine signal, such as numerical control machine, high-precision measuring apparatus, and the like.

A circulator of three-port total optical fiber type is prepared coupling the first and the second as well as the third optical fiber ports to each other and using optical fiber material as material of three said ports. The prepared circulator is suitably used on fields of optical fiber communication and optical fiber sense.

The invention is applicable to the field of character display, and provides a display method and a display system for multifont characters of an embedded system. The method comprises the following steps that a current word stock information index table is preset; the currently used Chinese font and English font word stock information table address is stored into the current font information index table; character data of internal codes to be displayed is read; the currently used word stock information is obtained through the current word stock information index table, and the dot matrix data of the currently used word stock and characters are obtained according to the word stock information and the character data; characters are displayed according to the width and the height of the dot matrix character matrixes provided by the word stock information and the dot matrix data. When the method and the system provided by the invention are implemented, various character fonts can be displayed.

The invention relates to a multifunctional intelligent knapsack. The multifunctional intelligent knapsack employs a storage battery for power supply; electric energy is provided to the storage battery in three manners including a solar cell panel, a hand-operated power generator and a micro USB interface; so electric energy can be provided to electronic equipment in the knapsack. Straps of the knapsack are provided with an illumination module, a shooting module, an acoustic alarming module and a GPS positioning module. A central processing unit of an integrated circuit plate in the joint part of the main body of the knapsack and the straps is used for processing; a wireless transmission and communication module is used for transmitting surrounding information of a user acquired by the shooting module and geographical location information of the user acquired by the GPS positioning module to a cloud or other assigned equipment, so the location and surrounding conditions of the user of the knapsack can be visually and timely learned; the knapsack employs modular design of equipment, which is favorable for increase, decrease and updating of systems and additional arrangement of other peripheral equipment; and the main body of the knapsack, the joint part of the main body of the knapsack and the straps, and the straps are detachably connected, which facilitates daily cleaning and maintenance of the main body.

The invention relates to a wireless-type transient-strain storage-testing system, in particular to the wireless-type transient-strain storage-testing system for outer-field explosive-impact tests, which belongs to the technical field of signal detection. The system comprises a control-center node and one or more than one testing nodes, wherein the testing node is formed from a strain foil, a storage-testing module and a first wireless-transmitting module; and the control-center node is formed from a second wireless-transmitting module and a computer-interface module. Since a wireless technology is adopted in the invention, the resistance error of a long lead can be eliminated, the influences of environmental temperature and humidity on the long lead are reduced, the interferences of impact waves and an ionizing field for the lead are reduced during the explosive reaction in the outer-field tests, and the testing reliability is improved; the testing nodes are conveniently increased and decreased and are not limited by the lead; and strain data are more convenient, rapider and more reliable in acquisition without building or searching a sheltering place for instruments or laying testing cables on the spot, and manpower and material resources are saved.

The invention discloses a cabinet, which comprises a cabinet body, a power distribution unit, a centralized power supply component and a plurality of servers. The power distribution unit is arranged in the cabinet; the centralized power supply component is disposed in the cabinet body and provided with a voltage conversion module and an output copper bar group, and the output copper bar group is connected with the voltage conversion module and provided with a power anode circuit and a power cathode circuit; and each server is provided with an anode contact end and a cathode contact end, the anode contact ends and the cathode contact ends are respectively connected with anode leading-out ends of the power anode circuit and cathode leading-out ends of the power cathode circuit in the output copper bar group. The cabinet has the advantages that hot plugging of the servers relative to the output copper bar group can be realized, accordingly, the quantity of the servers can be increased or decreased or the servers can be replaced under the condition without cutting off a power source, normal operation of other servers in the cabinet is unaffected, plugging is convenient, extensibility and flexibility of the cabinet are improved, and the cabinet is good in practicality.

The present invention a liquid crystal product test method. The method comprises the following steps: S1, performing image arrangement of general parameters; S2: constructing a special test function module for special parameters; and S3: combining the imaging arrangement parameters and the constructed special test function module to test the liquid crystal products. The test method performs imaging arrangement of the general parameters to construct the special test function module of the special parameters to realize that an open test platform for users. The users can conveniently increase and decrease the parameters and data of each test and are not limited to answer the changing requirement depending on the modification of graphical interfaces; and moreover, the liquid crystal product test method can correctly and rapidly satisfy the user requirement, and the clients can edit all the test codes and control the test flow of the liquid crystal products by themselves so as to reduce the dependence on the device factory technology support and improve the time efficiency.

The invention discloses a simulative clinical outpatient case study and test management system. The system comprises an authentication module, an instruction processing module, a judgment module, a case processing module, a command analyzing and processing module, a data browsing module, a case data adding module, a case data deleting module, a case data modifying module, a case analyzing module, a case adding module, a data management center module, a student practice module, a test authentication module, a test management module, a command calling module and a teaching user side module. According to the system, clinical electronic case management and teaching resource management are combined, information of study resources is classified by subjects, and thus students can conveniently analyze cases according to information obtained in the four ways of diagnosis of looking, listening, questioning and feeling, clinical manifestations and exanimation data of patients to obtain diagnosis, treatment, handling and medication results; by simulating the procedural study and test in examinations, diagnosis, handling and treatment of clinical outpatients, the systematicness of study resources is improved.

This invention relates to one far view positioning inquire and display device and method, wherein the device comprises background picture in front of spectator and display terminal before audience with one position inquire machine through one collection module to connect display terminal; position inquire machine operates longitude background beam to control the display terminal screen for relative local picture or key point spot relative visual frequency. This invention has the following advantages as user authorization right, good express ability and convenient updating and enhancing.

The invention provides an intelligent household control system and method. The system comprises at least one sensor, at least an intelligent household electric appliance, a user terminal and a wireless monitoring camera, wherein the sensor detects state information in the household; the user terminal is used to receive state information back fed to the household by the wireless monitoring camera, and sends a control instruction to the wireless monitoring camera; and the wireless monitoring camera communicates with the intelligent household electric appliance and ht user terminal, controls the intelligent household electric appliance according to the state information detected by the sensor, and controls the intelligent household electric appliance according to the control instruction. The intelligent household control system does not need an intelligent control host, it is not required to lay a lot of cables, limit of different cables is pushed, system installation becomes easier, and the expansibility of the system is improved.

The invention discloses an automatic liquid flow rate stabilizer based on jet cavitation. The device comprises a feed pipe, a suction chamber, a stop collar, decompression rings, a nozzle and a cavitation cavity. The device firstly divides a flow from upstream into two parts, wherein one part is sprayed into the cavitation cavity after being accelerated and decompressed via the nozzle, while the other part also flows into the cavitation cavity after being decompressed by the decompression rings connected in series. The two flows are converged again in a shrinkable pipe in the cavitation cavity, the two flows generate a vortex and then generates a relatively large cavitation to cause cavitation inception, then violent cavitation clouds are rapidly formed in a choke to congest the whole choke, and gradually collapsed after being continuously developed to a diffusion pipe; the choke is full of the cavitation clouds, so that fluctuation of outlet pressure cannot be transmitted to the upstream of the choke, and thus a pressure difference between the feed pipe and the shrinkable pipe is always constant, and flow rate stability is achieved. The device provided by the invention is extremely rapid in response speed, invention high in flow rate stability, simple in structure, high in maintainability, strong in adaptation capacity to medium, and capable of being used in large scale.

The invention discloses an extensible collector ring which comprises a stator and a rotating shaft of the collector ring, wherein the stator comprises a housing and upper and lower covers, a lower bearing is arranged between the lower end portion of the rotating shaft and the lower cover, an upper rotary cover is fixed on the upper end portion of the rotating shaft, an upper bearing is arranged between the upper rotary cover and the upper cover, a plurality of electric slip rings sleeving the rotating shaft are arranged in the cavity of the stator, and a plurality of electric slip rings are superposed along the axial direction and fixed on the lower end of the lower rotary cover through bolts. A plurality of elastic electric brushes are correspondingly arranged outside the plurality of electric slip rings, corresponding electric slip rings and the elastic electric brushes are electrically connected through electric metal wires on the elastic electric brushes, and the elastic electric brushes are extensibly arranged between the upper and lower covers through brush extensible devices. The extensible collector ring is simply structured and wear resistant, and the input and output lead quantity of the collector ring can be increased conveniently and flexibly to satisfy different requirements.